Lithographic press.



m. 634,6!6. Phtentad Oct M1899.

, J. c. HALLIGAN. LITHOGBAPHIC PRESS. (Appiication filed Apr. 15, 1898.) (Np Model.)

3 Shuts-Sheet l,

witnesses: In ven tor:

no. 634515. Patented on. 10, $99.; .,J. c. ug uaAu. LITHOGBAPHIG PRESS.

(Application fihd'Apr. 15, 189B.) 4 (in Model.) 3 3 Shank-Shut '3.

witnesses: Inventor 11:; ncllus mzfms a1. mnmumou mumamu. u. r.

UNITED STATES- PATENT OFFICE.

JAMES CHRISTOPHER HALLIGAN, OF BRISBANE, QUEENSLAND.

LITHOGRAPHIC PRESS.

SPECIFICATION forming part of Letters Patent No. 634,616, dated October 10, 1899.

I Application filed April 15, l89 8. Serial No. 677,705. (No model.)

To-ail whomjt may concern. I Be it known that I, JAMES Onnrs'rornnn HALLIGAN, residing at 78 Queen street, in the city of Brisbane and Colony of Queensland,

have invented certain new and useful Improvements in and Relating to Lithographic Presses and I do hereby declare the following to be'a full,'clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to improvements in lithographic presses; and the objects are, first,

to provide means whereby small jobbing-machines hitherto requiring an operator and assistant to work them may be workedby a single operator (a boy or girl) at the front of the press; second, to accelerate the speed of working; third, to minimize the wear of the work on the'stone, and, fourth, to obviate the necessity'of changing the stone when printing on difierent sizes of paper; The accompanying drawings illustrate an ordinary jobbing-press with my improve ments applied thereto.

Figure Tie a side elevation of press; Fig. 2, a front elevation of press; Fig. 3, a longitudinal section of press, taken on a line just in side of the side frame of Fig. 1; Fig. 4, a front elevation of feeding-board and lay-pointer; Fig. 5, a front elevation of roller-bearer removed and shieldcovering the same; 1 Fig. 5*,

an end'view of the roller, showing how the shield stands in relation thereto; Fig. 6, a view of lever-handle and connections to beltshifter; Fig. 7, an enlarged view of adjustable plates for raising and lowering the inking-rolle'rs; Fig. 8, a perspective View of rollers with runners and pinion; Fig. 9, a broken perspective view of rack-casting with the adjustable plates for raising and lowering inking-rollers in position 5 Fig.1(), a view of brake block and connections.

Similar letters refer to similar parts throu ghout the several views. v

A is the feeding-board,which consists of a flat piece of wood plated with brassflat both ends and .is provided with a central slotA, also plated with brass. This board is cut away at thetop, as at a a, on each side of the central slot and between the sides, as shown in the drawings. A is a metal feeding-lay secured to the feeding-board in any desirable manner, and A is a lay-pointer fitted to the feeding-board by a thu nab-screw A and adj ustable to differentpositions. I The end is curved, as at A to pass over the feeding-lay when the latter is fixed at or near the bottom of the feeding-board. The feeding-board being cut away, as shown, allows the operator standing in front to see the work on the stone through these cutraway portions and also affords easy access to the damping-rollers l-l, situated immediately behind the boards. The lower edge of the board is cut away or beveled ofi between its ends, as at A to allow for the introduction of a thick tympan B, which is secured upon the printing-cylinder B to suit any class of work and enables the operator to print cards without rubbing and envelope without marking. I

The cylinder B revolvesjin journals, and as the lithographic stone fixed in stone-carriage N travels forward the cylinder 3 presses on the paper to be printed, which is placed on the stone, and any length of paper from foolscap downward can be printed from the same stone andtransferred withoutchanging the stone or alteringit in any way.

' In Fig. 5, M is the axle of the roller-bearer, and M and M the bearers or solid collars integral with thesame, the end-of the axle extendingbeyond at each end,formin g trunnions M This roller-bearer is fitted in front of the press, below the rails oflthe stone-carriage N, revolving in journals on either side of the machine, and is adjustable to any height. This is substituted for the rollerbearings used in the present machines and for the small rollers D and D on either. side, as shown in Fig. 2. This roller-bearer receives the end of the stone-carriage as it travels forward and prevents the same from tipping up by the pressure of the cylinder B upon the top of the same.

- 0 is a metal shield covering the rollerbearer and is secured by bolts and nuts O to the driving-belt for throwing the machine in and out of gear, and so fixed that it can be manipulated by the operator at the front of the machine. E is the bracket for supporting this lever, and E is the pivot.

F is a foot-brake, with brake-block F on outer end, which engages with the fly-Wheel, with hinged foot-board f near its other end, securedat right angles to the brake-lever and sloping downward to the ground. This dispenses with cone-pulleys for differentiating the speed and also acts as a brake for stopping the machine. WVhen wishing to model'- ate the speed, the operator presses the foot on the sloping board and exerts the necessary pressure required, and if to stop the machine presses on the brake-lever direct, at the same time throwing the machine out of gear by switching the lever by means of the handle E.

In Fig. 9, Q is a metal rack-casting, preferably of brass, the teeth at either end having an inclined trend. The ends of this casting project beyond the teeth, and to the side is secured adjustable plates K K, also shown in Fig. 7. This rack-casting is secured to one side only of the stone-carriage.

Fig.8 shows one of the inking-rollers. On one end of each of these rollers is keyed or splined a runner m, and on the other end a pinion O, with runners m and m all of which are formed of one casting. The rollers are so placed that the pinions O engage with the teeth of the rack-casting Q. These runners and pinions can be easily removed from the rollers when required by withdrawing the keys. As the stone-carriage travels to and fro the pinions O engage with the rack Q, and runners on and m travel over the sides of the stone-carriage, and when the runners m and m meet the adjustable plates K, of which there are two fixed to either side of the machine, they ride over these plates, thus lifting the rollers free from the edge of the stone which is fixed in the stone-carriage and allow the same to smoothly glide onto the top of the stone, thus minimizing the friction and facilitating the machine being run at a greater speed with less wear and tear to the work and to the skins of the rollers. The pinions.O,which engage with the rack, are at each succeeding stroke of the machine released from the teeth and are received on the projecting ends of the rack-casting, thus insuring that the rollers do not impinge with the stone at each stroke of the machine at the same spot on the roller. The pinions and rack compel the rollers to revolve and prevent the possibility of their sliding or skidding, which they occasionally do in the present machines, thereby causing the work to wear out and fine lines to disappear.

Referring back to Fig. 1, p is a lever pivoted between its ends to the machine at p for turning the ink or feed roller, and this lever is provided with an inclined forward end P for raising and lowering the distributing-roller P, which is supported by links or oscillating bearings P on either side of the machine. This leveris connected atits lower end by a rod 19 to a cam g, which actuates the cylinder B. The mechanism upon which the cam (1 acts to actuate the cylinderB may be of any well-known or desired form, but is here shown as a frame connected with the bearings of the cylinder by reciprocating rods Q.

The ink-duct consists of a trough R for containing the ink,in front of which is fixed an ink or feed roller S, which forms the front wall thereof. On one end of this feed-roller is a ratchet T. A lever U is pivoted between its ends to the axle of the roller or, if desired, to the frame of the machine, and to the upper end of this lever is pivoted a pawl V, which engages the ratchet. Beneath this roller is another ink or distributer roller P for picking up the ink from the feed-roller and distributing it on the stone. As the lever 19 moves backward and forward a small stud 7 near the upper end thereof engages I with the lever U, which actuates the pawl V, and this in turn moves the ratchet T, which revolves, the feed-roller S, and this roller by contact revolves the distributing-roller P. At each stroke of the machine the distributingroller (being supported by oscillating links P) slides down the inclined end P of the lever 19 onto thetop of the inking-slab G. The lower end of the lever U is normally held back by means ofa spring U. When not required to work the ink-roller, the lower end of the lever U may be pulled and held forward in any desirable mannera,

G is the inking-slab, G the distributing roller, G the inking-roller, N the stone-carriage, and H the damping-rollers supported by small brackets H, none of which form any part of my invention and are common to machines of this class. They are simply referred to by way of explanation.

My improvements consist in the special shape of the feeding-board A and lay-pointer A, the rollenbearer, as illustrated in Fig. 4, and the lever for working the ink-duct roller.

I do notclaim the press as a whole; but

What I do claimv as, my invention, and desire to secure by Letters Patent, is as follows:

1. In a lithographic machine, the combination with a feeding-board provided with a central slot, cut-away portionsv at its upper edge on either side of the slot, and a feedinglay adj ustably secured within the slot; of a lay-pointer provided with a longitudinallyslotted rear portion and a curved front portion, anda set-screw passing through the slot at right angles to the length of the pointer and into the board, substantially as and for the purpose set forth.

2. In a lithographic machine, the combination with a frame, a stone-carrying carriage, and means for operating the same; of a feedroller, a pawl and ratchet connected thereto,

an oscillating distributing-roller contacting IIO with the feed-roller, a lever for operating the pawl, and a second lever engaging the first for operating the same and having an in elined forwardly-projecting end for lowering the distributing-roller into contact with the stone, substantially as and for the purpose set forth.-

3. In alithographic machine, the combination with the stone-carriage, a feed-roller, a ratchet secured thereto, a lever pivoted between its ends to the roller, a pawl at one end thereof engaging the ratchet, and a spring near the other end of the lever for normally holding the same back; of an oscillating distributing-roller contacting with I the feed roller, a second lever pivoted between its ends to the frame, a stud thereon contacting with the other lever, and means for operating the second lever for turning the feed-roller and lowering the distribntin groller onto the stone,v

all substantially as and for the purpose set forth.

4. In a lithographic machine, the combination with a moving carriage,a feed-roller jonr naled above the carriage, a ratchet connected to the roller, a lever pivoted between its. ends to the roller-shaft,a pawl engaging the ratchet and connected at one end to the lever, and a spring near the other end for holding said end normally back; of an oscillating distributingroller contacting with the feed-roller, a second lever pivoted between its ends to the frame, a st-udnear its upper end engaging the ratchet-lever, an inclined forwardly-projecting arm contacting with the shaft of the distributing-roller, and means for rocking the second lever to turn the feed-roller and lower the distributing-roller as the carriage is operated, substantially as described.

5. In a lithographic press, the combination with an inking apparatus consisting of a feedroller, a ratchet at one end thereof, a lever pivoted between its ends to the roller-shaft,

a pawl pivotedat one end of the lever and engaging the ratchet, a spring at the other for normally holding the lower end of the le Ver back, and an oscillating distributer contacting with the ink-roller of a second lever pivoted between its ends to the frame, a forwardly-projecting inclined arm near the upper end thereof, a stud secured thereto and engaging the first'lever, and means for operating the second lever, said first lever being adapted to be held out of engagement with the stud, substantially as and for the purpose set forth.

In testimony whereof I aflix my signature in presence of two witnesses.

JAMES CHRISTOPHER HALLIGAN.

Witnesses:

RoBr. H. MAcDonNELL, 'E. GARDNER.WEBB. 

